Display control system, display control method, computer-readable storage medium having stored thereon display control program, and display control apparatus

ABSTRACT

While an example terminal device is being held with its long sides extending horizontally, when a left-right direction is inputted by using a right analog stick, a first virtual camera is directed to a left-right direction in a virtual space. On the other hand, while the terminal device is being held with its long side extending vertically, when an apparent left-right direction, that is, an up-down direction in the state where the terminal device is held with its long sides extending horizontally, is inputted by using a right analog stick, the first virtual camera is directed to the left-right direction in the virtual space.

CROSS REFERENCE TO RELATED APPLICATION

The disclosure of Japanese Patent Application No. 2012-085098, filed on Apr. 4, 2012, is incorporated herein by reference.

FIELD

The technology disclosed herein relates to a display control system, a display control method, a computer-readable storage medium having stored thereon a display control program, and a display control apparatus, for causing a display section to display an image in accordance with an operation performed by a user.

BACKGROUND AND SUMMARY

Conventionally, there is a display device that changes a display content, using the attitude of an apparatus. For example, there is an apparatus that detects the gravity direction, rotates an object based on the gravity direction, and causes a display device to display the rotated object.

However, the conventional apparatus rotates the object in accordance with the attitude of the apparatus and causes the rotated object to be displayed, but does not control a display image based on an input operation performed by a user.

Therefore, an object of an embodiment is to provide a technology that can control a display image by using an input operation performed onto a direction input section, while taking the attitude of the apparatus into consideration.

An embodiment has adopted the following configurations to solve the above issue.

One embodiment is a display control system which controls, in accordance with an operation performed onto an operation device which includes a direction input section and a display section, a display content for the display section. The display control system includes an input data obtaining section, a first virtual camera control section, and a display control section. The input data obtaining section obtains input data in accordance with an input direction inputted by using the direction input section. The first virtual camera control section controls a virtual camera in a virtual space based on the input direction. The display control section causes the display section to display an image based on the virtual camera controlled by the first virtual camera control section. The first virtual camera control section changes the input direction indicated by the input data, in accordance with a change in an attitude of the operation device, and controls the virtual camera based on the changed direction.

According to the above, it is possible to control the virtual camera by an input direction inputted by using the direction input section of the operation device, and to change the input direction in accordance with the attitude of the operation device.

Further, in another configuration, the first virtual camera control section may control the virtual camera based on an input direction inputted by using the direction input section, the input direction being based on a real space.

According to the above, it is possible to control the virtual camera based on an input direction inputted by using the direction input section, the input direction being based on the real space, irrespective of the attitude of the operation device. For example, even when the attitude of the operation device has been changed, it is possible to control the virtual camera based on an input in an apparent right direction.

Further in another configuration, the display control system may further include a second virtual camera control section which controls an orientation of the virtual camera, in accordance with the attitude of the operation device.

According to the above, it is possible to further control the orientation of the virtual camera in accordance with the attitude of the operation device.

Further, in another configuration, the first virtual camera control section may change an orientation of the virtual camera such that the changed direction of the orientation of the virtual camera agrees with a direction in the virtual space corresponding to an input direction inputted by using the direction input section, the input direction being based on a real space.

According to the above, even when the attitude of the operation device has been changed, it is possible to change the orientation of the virtual camera such that the input direction inputted by using the direction input section, the input direction being based on the real space, agrees with the changed direction of the orientation of the virtual camera. Accordingly, for example, when the input direction (apparent input direction) inputted by using the direction input section, the input direction being based on the real space, is the right direction, it is possible to direct the orientation of the virtual camera to the right direction.

Further, in another configuration, the first virtual camera control section may rotate the input direction in accordance with a rotation of the operation device about an axis perpendicular to a screen of the display section, and control an orientation of the virtual camera based on the rotated input direction.

According to the above, when the operation device is rotated about an axis perpendicular to the screen of the display section, it is possible to rotate the input direction inputted by using the direction input section in accordance with the rotation of the operation device, and to control the orientation of the virtual camera based on the rotated input direction.

Further, in another configuration, based on a component in a predetermined direction of the input direction, the first virtual camera control section may change an orientation of the virtual camera into a predetermined direction in the virtual space.

According to the above, it is possible to extract a component in a predetermined direction (e.g., left-right direction) of the input direction, and to change the orientation of the virtual camera into the predetermined direction (e.g., left-right direction) in the virtual space.

Further, in another configuration, in accordance with a rotation of the operation device about an axis perpendicular to a screen of the display section, the second virtual camera control section may rotate the virtual camera about an imaging axis thereof in the rotation direction of the operation device.

According to the above, when the operation device is rotated about an axis perpendicular to the screen of the display section, it is possible to rotate an image displayed on the display section in a reverse direction. Accordingly, it is possible to prevent the image displayed on the display section from being apparently rotated.

Further, in another configuration, the display control system may further include a user object control section configured to control a moving direction of a user object movable in the virtual space, based on an input direction inputted by using the direction input section or a second direction input section provided in the operation device. The user object control section changes the input direction in accordance with the change in the attitude of the operation device, and controls the moving direction of the user object based on the changed direction. The display control section causes the display section to display an image including the user object.

According to the above, it is possible to move the user object in the virtual space, based on the input direction inputted by using the direction input section.

Further, in another configuration, the display control system may include a third virtual camera control section and a second display control section. The third virtual camera control section changes an orientation of a second virtual camera arranged in the virtual space, in accordance with an orientation of the virtual camera. The second display control section causes a display device other than the display section to display an image of the virtual space viewed from the second virtual camera.

According to the above, it is possible to cause a display device other than the display section to display an image, using the second virtual camera.

Further, another example is a display control system configured to control, in accordance with an operation performed onto an operation device which includes a direction input section and a display section, a display content for the display section. The display control system includes an input data obtaining section, a control section, and a display control section. The input data obtaining section obtains input data in accordance with an input direction inputted by using the direction input section. The control section controls a predetermined object in a virtual space based on the input direction. The display control section causes the display section to display an image in accordance with an attitude of the operation device and causes the display section to display an image based on a predetermined object controlled by the control section. Further, the control section changes the input direction indicated by the input data in accordance with a change in the attitude of the operation device, and controls the predetermined object based on the changed direction.

According to the above, it is possible to control a predetermined object by an input direction inputted by using the direction input section of the operation device, and to change the input direction in accordance with the attitude of the operation device. Here, the predetermined object may be, for example, a virtual camera or an object operated by a user.

Further, another embodiment may be a display control method performed in the above display control system. Such a display control system may be configured by a single apparatus or a plurality of apparatuses. Further, another example may be a display control program which causes a computer to function as the sections included in the above-described display control system. Further, another example may be a display control apparatus including the sections included in the above-described display control system.

According to the present embodiment, it is possible to control a display image by an input operation performed onto a direction input section, in accordance with the attitude of the operation device.

These and other objects, features, aspects and advantages of the exemplary embodiment will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an external view showing a non-limiting example of a configuration of a game system 1;

FIG. 2 is a block diagram showing a non-limiting example of a configuration of the game system 1;

FIG. 3 is a non-limiting example of images displayed on a display device 2 and an LCD 71 of a terminal device 7 at the time when the game of the present embodiment is performed;

FIG. 4 illustrates a non-limiting example of a change in the orientation of a first virtual camera C1 at the time when the terminal device 7 is rotated in a yaw direction (about Y-axis) from a reference attitude;

FIG. 5 illustrates a non-limiting example of a change in the orientation of the first virtual camera C1 at the time when the terminal device 7 is rotated in a pitch direction (about X-axis) from the reference attitude;

FIG. 6 illustrates a non-limiting example of a change in the orientation of the first virtual camera C1 at the time when the terminal device 7 is rotated in a roll direction (about Z-axis) from the reference attitude;

FIG. 7 illustrates a non-limiting example of a change in the orientation of the first virtual camera C1 at the time when a right direction (X-axis negative direction) is inputted by using a right analog stick 72B;

FIG. 8 illustrates a non-limiting example of a change in the orientation of the first virtual camera C1 at the time when a direction input is performed by using the right analog stick 72B, while the terminal device 7 is being held such that X-axis thereof is directed toward the gravity direction (vertical holding);

FIG. 9 illustrates a non-limiting example of a change in the orientation of the first virtual camera C1 at the time when a direction input is performed by using the right analog stick 72B, while the terminal device 7 is being held (inclined holding) such that X-axis thereof is inclined by a predetermined angle relative to the horizontal direction in the real space;

FIG. 10 shows a non-limiting example of how an input vector in accordance with an input direction of the right analog stick 72B is rotated in accordance with the attitude of the terminal device 7;

FIG. 11 shows a non-limiting example of a control of the orientation of the first virtual camera C1 based on the attitude of the terminal device 7 and a direction input operation using the right analog stick 72B;

FIG. 12 illustrates a control of two virtual cameras based on an operation of rotating the terminal device 7 in the yaw direction and an input in the left-right direction using the right analog stick 72B;

FIG. 13 illustrates a non-limiting example of a control of two virtual cameras based on an operation of rotating the terminal device 7 in the pitch direction;

FIG. 14 illustrates a non-limiting example of a control of two virtual cameras based on an operation of rotating the terminal device 7 in the roll direction;

FIG. 15 shows a non-limiting example of images displayed on the terminal device 7 and the display device 2 when a position on the screen of the display device 2 is indicated by using a controller 5;

FIG. 16 illustrates a non-limiting example of a position at which an indicated object 87 is located;

FIG. 17 shows a non-limiting example of how a user object 81 is moved based on a direction input using a left analog stick 72A of the terminal device 7;

FIG. 18 illustrates a non-limiting example of a movement of the user object 81 at the time when a direction input operation is performed by using the left analog stick 72A while the terminal device 7 is being held vertically;

FIG. 19 shows a non-limiting example of a scene where the user object 81 has moved and arrived at a house object 82 indicated by a second user;

FIG. 20 shows a non-limiting example of a scene where the user object 81 has moved and arrived at a building object 89 arranged in the virtual space;

FIG. 21 shows non-limiting various examples of positional relationships between the first virtual camera C1 and the second virtual camera C2 and imaging directions (sight line directions) thereof.

FIG. 22 shows a non-limiting example of an image displayed on the display device 2 when the second virtual camera C2 is set at a viewpoint C shown in FIG. 21;

FIG. 23 is a non-limiting example of an image displayed on the display device 2 when the second virtual camera C2 is set at a viewpoint D shown in FIG. 22;

FIG. 24 shows a non-limiting example of various types of data stored in a game apparatus 3; and

FIG. 25 is a non-limiting example of a main flowchart showing the flow of processes performed in the game apparatus 3.

DETAILED DESCRIPTION OF NON-LIMITING EXAMPLE EMBODIMENTS

(An Example of Configuration of Game System)

Hereinafter, a game system 1 according to an embodiment will be described with reference to the drawings. FIG. 1 is an external view showing a non-limiting example of a configuration of the game system 1. FIG. 2 is a block diagram showing a non-limiting example of a configuration of the game system 1. As shown in FIG. 1 and FIG. 2, the game system 1 includes a stationary display device 2 (e.g., television), a stationary game apparatus 3, an optical disc 4, a controller 5, a marker device 6, and a terminal device 7.

The game apparatus 3 includes a CPU 10, a memory 11, and the like. When a program stored in a storage medium such as the optical disc 4 is loaded onto a memory, the CPU 10 executes the program loaded onto the memory, thereby performing processing described later. Then, the game apparatus 3 outputs an image as a result of the processing, to the display device 2 and the terminal device 7.

The terminal device 7 is a portable display device which is small enough to be held by both hands or one hand of a user. The user can move the terminal device 7 by holding it with his/her hand(s), or can locate the terminal device 7 at any position to use it. The terminal device 7 includes an LCD (liquid crystal display) 71 which is a display device. The terminal device 7 also includes an input section 72 such as an analog stick (left analog stick 72A, right analog stick 72B) for inputting a direction, an inertial sensor (gyro sensor, accelerometer, and the like) 73 capable of outputting attitude data in accordance with the attitude of the terminal device 7, and the like. The terminal device 7 and the game apparatus 3 are capable of wirelessly communicating with each other. The terminal device 7 receives data of an image generated by the game apparatus 3 from the game apparatus 3 and displays the image on the LCD 71. Moreover, the terminal device 7 transmits, to the game apparatus 3, operation data based on operations performed onto the terminal device 7 (operation onto the input section 72 and an operation to change the attitude of the terminal device 7).

The controller 5 is small enough to be held by a user, and is used to indicate a position on the screen of the display device 2. For example, by an imaging section provided in the controller 5 receiving infrared light from the marker device 6 arranged at predetermined position on the display device 2, the indicated position on the screen is detected. Alternatively, a sensor for detecting an attitude is provided in the controller 5, and a position on the screen may be indicated by the attitude of the controller 5 (for example, the middle point of the screen is indicated for the initial attitude, and the indicated position changes in accordance with a change in the attitude from the initial attitude).

The terminal device 7 is held by a first user, and the controller 5 is held by a second user, which will be described in detail later.

It should be noted that the game system 1 shown in FIG. 1 and FIG. 2 is merely an example and the processing described later may be performed in any apparatus.

(Outline of Processing)

Next, an outline of the processing performed in the game system 1 of the present embodiment will be described. FIG. 3 shows a non-limiting example of images displayed on the display device 2 and the LCD 71 of the terminal device 7 at the time when the game of the present embodiment is performed. In the present embodiment, the terminal device 7 is held by the first user, and the controller 5 is held by the second user.

As shown in FIG. 3, a user object 81, a house object (selection object) 82, and the like, which are arranged in a virtual space defined by an xyz coordinate system, are displayed on the display device 2. Moreover, a rock object 83, a tree object 84 (84 a to 84 c), and the like are arranged in the virtual space. The user object 81 is a virtual character operated by the first user using the terminal device 7. An image similar to that on the display device 2 is displayed on the LCD 71 of the terminal device 7. As shown in FIG. 3, the image displayed on the terminal device 7 is an image whose angle of view is narrower than that of the image displayed on the display device 2. The images displayed on the terminal device 7 and the display device 2 are generated by using a first virtual camera C1 and a second virtual camera C2 arranged in the virtual space, respectively, and are changed in accordance with an operation performed onto the terminal device 7.

Specifically, the orientations (attitudes) of the first virtual camera C1 and the second virtual camera C2 are controlled by the attitude of the terminal device 7 and an operation performed onto the right analog stick 72B of the terminal device 7. For example, when the Y-axis (axis along the up-down direction) of the XYZ coordinate system fixed for the terminal device 7 is parallel to the gravity direction, the X-axis (axis along the left-right direction) is parallel to the ground, and the Z-axis (axis perpendicular to the LCD 71) is directed to the screen of the display device 2, the images shown in FIG. 3 are displayed on the terminal device 7 and the display device 2. When the attitude of the terminal device 7 is changed relative to this attitude of the terminal device 7 (hereinafter, this may be referred to as “reference attitude”), the orientations of the first virtual camera C1 and the second virtual camera C2 are also changed. It should be noted that the attitude when the Y-axis is inclined by a predetermined angle relative to the ground in the real space may be defined as the reference attitude. When the user sees the screen while holding the terminal device 7, it may be easier to see the screen when the terminal device 7 is slightly inclined than when the terminal device 7 is held vertically (such that the Y-axis is parallel to the gravity direction). Therefore, such an attitude of the terminal device 7 may be defined as the reference attitude.

Hereinafter, control of the first virtual camera C1 by using operations performed onto the terminal device 7 (operation to change the attitude of the terminal device 7 itself, and an direction input operation performed onto the right analog stick 72B) will be described with reference to FIG. 4 to FIG. 10.

First, a change in the orientation of the first virtual camera C1 in accordance with a change in the attitude of the terminal device 7 will be described with reference to FIG. 4 to FIG. 6. FIG. 4 illustrates a non-limiting example of a change in the orientation of the first virtual camera C1 at the time when the terminal device 7 is rotated in a yaw direction (about Y-axis) from the reference attitude. FIG. 5 illustrates a non-limiting example of a change in the orientation of the first virtual camera C1 at the time when the terminal device 7 is rotated in a pitch direction (about X-axis) from the reference attitude. FIG. 6 illustrates a non-limiting example of a change in the orientation of the first virtual camera C1 at the time when the terminal device 7 is rotated in a roll direction (about Z-axis) from the reference attitude.

In FIG. 4, a view of the terminal device 7 seen from above in the real space is shown, and a view of the first virtual camera C1 seen from above the camera (from above in the virtual space) is shown. For example, as shown in FIG. 4, when the terminal device 7 is in the reference attitude, the imaging direction (Zc1-axis) of the first virtual camera C1 is directed to the rock object 83 which is arranged in the virtual space, and the rock object 83 is displayed in the central region in the left-right direction on the screen of the terminal device 7. From this state, when the rear surface of the terminal device 7 is directed rightward in the real space, the first virtual camera C1 is also directed rightward in the virtual space. Specifically, when the terminal device 7 is rotated in the yaw direction (about Y-axis), the first virtual camera C1 is rotated about Yc1-axis in an Xc1Yc1Zc1 coordinate system fixed for the first virtual camera C1, in accordance with the rotation angle. Here, Xc1-axis extends in the left direction relative to the first virtual camera C1, and Yc1-axis extends in the up direction relative to the first virtual camera C1, and Zc1-axis extends in the imaging direction of the first virtual camera C1. By the first virtual camera C1 rotating about Yc1-axis, the rock object 83, which has been displayed in the central region of the screen of the terminal device 7 before the rotation of the terminal device 7, is moved to a left region of the screen after the rotation of the terminal device 7. Moreover, the house object 82 having been displayed in a right region of the screen before the rotation is displayed near the center of the screen after the rotation of the terminal device 7. Moreover, a tree object 84 b having been displayed in a left region of the screen before the rotation comes outside the imaging range of the first virtual camera C1 after the rotation, and is not displayed on the screen any more.

FIG. 5 shows the terminal device 7 viewed from the right direction and the first virtual camera C1 viewed from the right of the camera at that time. When the terminal device 7 is in the reference attitude as shown in FIG. 5, the imaging direction (Zc1-axis) of the first virtual camera C1 is parallel to the ground (xz-plane) in the virtual space. Accordingly, the horizon in the virtual space is displayed on the screen of the terminal device 7, near the center in the up-down direction of the screen. When the rear surface of the terminal device 7 is directed upward in the real space from this state, the first virtual camera C1 is also directed upward in the virtual space. Specifically, when the terminal device 7 is rotated in the pitch direction (about X-axis), the first virtual camera C1 is rotated about Xc1-axis in accordance with the rotation angle. Accordingly, the rock object 83 and the like, which have been displayed in the central region in the up-down direction of the screen of the terminal device 7 before the rotation of the terminal device 7, are displayed, after the rotation of the terminal device 7, in a lower region in the up-down direction of the screen. A sun object 85, which was not displayed on the screen before the rotation because it was located upper than and outside the screen in the virtual space, has entered the imaging range of the first virtual camera C1 after the rotation, and is displayed on the screen.

Moreover, FIG. 6 shows a view of the terminal device 7 viewed from the front thereof, and a view of the first virtual camera C1 viewed from the rear of the camera at that time. As shown in FIG. 6, when the terminal device 7 is in the reference attitude, the imaging direction (Zc1-axis) of the first virtual camera C1 is not rotated, and Xc1-axis fixed for the first virtual camera C1 is parallel to the ground in the virtual space. When the terminal device 7 is rotated in the roll direction (about Z-axis) from this state, the first virtual camera C1 is rotated about Zc1-axis in accordance with the rotation angle. Specifically, the first virtual camera C1 is rotated about Zc1-axis (imaging axis), in the same rotation direction as the rotation direction about Z-axis of the terminal device 7, by the same rotation amount as the rotation amount about Z-axis of the terminal device 7. Accordingly, the image generated by using the first virtual camera C1 is rotated in a reverse direction of the rotation direction of the terminal device 7, about the central axis of the screen of the terminal device 7. As a result, the rotation in the roll direction of the terminal device 7 is canceled, and the image is not apparently rotated in the roll direction on the screen of the terminal device 7 when viewed by the first user. In other words, the ground (xz-plane) in the virtual space included in the image displayed on the screen of the terminal device 7 is parallel to the ground in the real space, and the up-down direction in the virtual space is parallel to the gravity direction in the real space.

Therefore, for example, when the first user rotates the terminal device 7 by 90 degrees counterclockwise in the roll direction, and thus X-axis is oriented toward the gravity direction (holding the terminal device 7 in such an attitude may be referred to as “vertical holding”), the image is rotated by 90 degrees clockwise, and the image having longer sides in the up-down direction is displayed on the terminal device 7 (see FIG. 8).

Rotations of the yaw direction, the pitch direction, and the roll direction of the terminal device 7 can be calculated, based on a physical quantity detected by the inertial sensor 73 of the terminal device 7, such as an angular velocity detected by a gyro sensor and/or a gravitational acceleration detected by an accelerometer. For example, by integrating by time the angular velocities about X, Y, and Z-axes detected by a gyro sensor, the attitude of the terminal device 7 (rotations about the respective axes) can be calculated. It should be noted that the detection of the attitude of the terminal device 7 is not necessarily performed by the inertial sensor but other methods (for example, an image of the terminal device 7 is taken by a camera, and the terminal device 7 is detected based on the taken image, and the like) may be employed.

Next, control of the orientation of the first virtual camera C1 based on a direction input using the right analog stick 72B will be described. FIG. 7 illustrates a non-limiting example of a change in the orientation of the first virtual camera C1 at the time when a right direction (X-axis negative direction) is inputted by using the right analog stick 72B.

As shown in FIG. 7, when the right direction is inputted by using the right analog stick 72B (when the right analog stick 72B is slid in the right direction), the first virtual camera C1 is rotated in the yaw direction in accordance with the input amount (slide amount and slide time period). Specifically, the first virtual camera C1 is rotated about an axis parallel to y-axis in the virtual space. Therefore, when the right direction is inputted using the right analog stick 72B, the first virtual camera C1 is directed rightward in the virtual space, and the rock object 83 having been displayed near the center in the left-right direction of the screen before the input is now displayed in a left region in the left-right direction of the screen after the input. In FIG. 7, since y-axis fixed in the virtual space and Yc1-axis fixed for the first virtual camera C1 are parallel to each other, the first virtual camera C1 is rotated about Yc1-axis.

When the left direction is inputted by using the right analog stick 72B, the first virtual camera C1 is reversely rotated about y-axis. Therefore, when the left direction is inputted by using the right analog stick 72B, the first virtual camera C1 is directed leftward in the virtual space.

Further, in FIG. 7, when an upper right direction is inputted by using the right analog stick 72B, for example, only a component in the right direction of the input is used for rotating the first virtual camera C1 in the yaw direction. Further, in FIG. 7, when an up-down direction is inputted by using the right analog stick 72B, the first virtual camera C1 is not rotated in the yaw direction. That is, the first virtual camera C1 is rotated in the yaw direction (left-right direction in the virtual space) in accordance with an input in the left-right direction using the right analog stick 72B, whereas the first virtual camera C1 is not rotated in the yaw direction, the pitch direction (up-down direction in the virtual space), or the roll direction, for an input in the up-down direction using the right analog stick 72B.

FIG. 8 illustrates a non-limiting example of a change in the orientation of the first virtual camera C1 at the time when a direction input is performed by using the right analog stick 72B, while the terminal device 7 is being held such that X-axis thereof is oriented toward the gravity direction (vertical holding). As shown in FIG. 8, in the case where the terminal device 7 is being held such that X-axis thereof is oriented in the gravity direction, that is, in the case where the terminal device 7 has been rotated by 90 degrees counterclockwise (about Z-axis) from the reference attitude shown in FIG. 3, when the right analog stick 72B is slid in the Y-axis negative direction (the right direction relative to the gravity direction), the first virtual camera C1 is rotated about y-axis. By the first virtual camera C1 being rotated about y-axis, the first virtual camera C1 is directed rightward in the virtual space. As a result, the house object 82, which was only partially displayed in a right part of the screen before the operation of the right analog stick 72B, is displayed near the center in the left-right direction of the screen after the operation.

In the state of the vertical holding shown in FIG. 8, when the right analog stick 72B is slid in the Y-axis positive direction (the left direction relative to the gravity direction), the first virtual camera C1 is directed leftward in the virtual space. Further, in the state of vertical holding shown in FIG. 8, when the X-axis direction (the gravity direction) is inputted by using the right analog stick 72B, the orientation of the first virtual camera C1 is not changed.

FIG. 9 illustrates a non-limiting example of a change in the orientation of the first virtual camera C1 at the time when a direction input is performed by using the right analog stick 72B, while the terminal device 7 is being held (inclined holding) such that X-axis thereof is inclined by a predetermined angle relative to the horizontal direction in the real space. As shown in FIG. 9, when the terminal device 7 is being held, rotated in the roll direction (about Z-axis) by a predetermined angle (for example, 30 degrees) from the reference attitude, the first virtual camera C1 is also rotated in the roll direction (about Zc1-axis). In this state, when the right analog stick 72B is slid to an apparent right direction (lower right direction in the reference attitude), the first virtual camera C1 is rotated about y-axis in the virtual space. That is, when the right analog stick 72B is slid to an apparent right direction, the first virtual camera C1 is directed rightward in the virtual space. Accordingly, the house object 82, which was displayed in a right part of the screen before the operation of the right analog stick 72B, is moved leftward in the screen after the operation.

As described above, even when the attitude of the terminal device 7 is changed, the first virtual camera C1 is controlled so as to be directed toward a direction in the virtual space that corresponds to an apparent input direction by the right analog stick 72B. That is, the orientation of the first virtual camera C1 is changed such that the changed direction of the orientation of the first virtual camera C1 agrees with the apparent input direction of the analog stick. Here, the “apparent input direction” means a sliding direction of the right analog stick 72B based on the real space. When the terminal device 7 is in the reference attitude, the apparent input direction coincides with the direction of the input vector indicating the input direction by the right analog stick 72B detected by the terminal device 7. On the other hand, when the terminal device 7 is rotated about Z-axis from the reference attitude, the apparent input direction differs from the direction of the input vector. Specifically, an input vector indicating the input direction by the right analog stick 72B is rotated in accordance with the attitude of the terminal device 7, and the orientation of the first virtual camera C1 is changed based on the rotated vector.

FIG. 10 shows a non-limiting example of how an input vector in accordance with the input direction by the right analog stick 72B is rotated in accordance with the attitude of the terminal device 7. An operation performed onto the right analog stick 72B of the terminal device 7 is calculated as an input vector. As shown in FIG. 10, the input vector in accordance with the input direction by the right analog stick 72B is expressed as coordinate values in an IxIy coordinate system. Ix-axis coincides with the X-axis negative direction for the terminal device 7, and Iy-axis coincides with the Y-axis positive direction for the terminal device 7. In the case where the terminal device 7 is rotated by θr in the roll direction (about Z-axis), when the values of the input vector are, for example, (0.707, −0.707), a correction vector obtained by rotating the input vector by θr is calculated. Then, the correction vector is used for rotation about y-axis for the first virtual camera C1. More specifically, for a rotation about y-axis for the first virtual camera C1 (rotation in the yaw direction), only an input in the apparent left-right direction using the right analog stick 72B is used. Therefore, the first virtual camera C1 is rotated about y-axis in accordance with the value of the 1x-axis component of the correction vector.

For example, in the case where the rotation angle θr in the roll direction of the terminal device 7 is 90 degrees (in the case of vertical holding), when the values of the input vector are (0, −1.0), the correction vector obtained by rotating the input vector by 90 degrees is (1, 0). Therefore, in this case, the first virtual camera C1 is rotated about y-axis, regarding that the right direction by the right analog stick 72B has been inputted. Moreover, in the case where the rotation angle θr in the roll direction of the terminal device 7 is 90 degrees, for example, when the values of the input vector are (1, 0), the correction vector obtained by rotating the input vector by 90 degrees is (0, 1). Therefore, in this case, the first virtual camera C1 is not rotated about y-axis, regarding that the up direction by the right analog stick 72B has been inputted.

As described above, a correction vector is calculated by correcting an input vector indicating an input direction by the right analog stick 72B, in accordance with the attitude of the terminal device 7. Then, based on the correction vector, the first virtual camera C1 is rotated about the up-down direction axis in the virtual space. Accordingly, even when the attitude of the terminal device 7 is changed, it is possible to direct the first virtual camera C1 in the apparent input direction by the right analog stick 72B (horizontal direction relative to the gravity direction).

As described above, in the present embodiment, the orientation of the first virtual camera C1 is controlled by an operation of changing the attitude of the terminal device 7 (first operation), and by a direction input operation using the right analog stick 72B (second operation). As shown in FIG. 11, by combining the camera control by the first operation and the camera control by the second operation, the orientation of the first virtual camera C1 is determined.

(Game Operation Using Terminal Device and Display Device)

Next, a game operation performed by a plurality of people using images displayed on the terminal device 7 and the display device 2 will be described with reference to FIG. 12 to FIG. 19. First, with reference to FIG. 12 to FIG. 14, images displayed on the terminal device 7 and the display device 2 will be described.

FIG. 12 illustrates a non-limiting example of an operation of rotating the terminal device 7 in the yaw direction, and a control of two virtual cameras based on an input in the left-right direction using the right analog stick 72B. As described above, the orientation of the first virtual camera C1 for generating an image to be displayed on the LCD 71 of the terminal device 7 is changed, in accordance with rotation of the terminal device 7 in the yaw direction (about Y-axis) and an input in the left-right direction by the right analog stick 72B. Similarly to the first virtual camera C1, the orientation of the second virtual camera C2 for generating an image to be displayed on the display device 2 is changed, in accordance with rotation of the terminal device 7 in the yaw direction and an input in the left-right direction by the right analog stick 72B. That is, with respect to the yaw direction, the second virtual camera C2 operates in conjunction with the first virtual camera C1. Specifically, the rotation about Yc1-axis in the coordinate system fixed for the first virtual camera C1 is equal to the rotation about Yc2-axis in an Xc2Yc2Zc2 coordinate system fixed for the second virtual camera C2. However, in order to avoid an abrupt change, the second virtual camera C2 may be configured to follow the first virtual camera C1 over a predetermined time period. It should be noted that Xc2-axis extends in the left direction relative to the second virtual camera C2, Yc2-axis extends in the up direction relative to the second virtual camera C2, and Zc2-axis extends in the imaging direction of the second virtual camera C2.

FIG. 13 illustrates a non-limiting example of a control of two virtual cameras based on an operation of rotating the terminal device 7 in the pitch direction. FIG. 14 illustrates a non-limiting example of a control of two virtual cameras based on an operation of rotating the terminal device 7 in the roll direction. As shown in FIG. 13, when the terminal device 7 is rotated in the pitch direction (about X-axis), the first virtual camera C1 is also rotated in the pitch direction (about Xc1-axis). On the other hand, even when the terminal device 7 is rotated in the pitch direction, the second virtual camera C2 is not rotated in the pitch direction (about Xc2-axis).

Further, as shown in FIG. 14, when the terminal device 7 is rotated in the roll direction (about Z-axis), the first virtual camera C1 is also rotated in the roll direction (about Zc1-axis). On the other hand, even when the terminal device 7 is rotated in the roll direction, the second virtual camera C2 is not rotated in the roll direction (about Zc2-axis). That is, with respect to the pitch direction and the roll direction, the second virtual camera C2 does not operate in conjunction with the first virtual camera C1.

As described above, by rotating the terminal device 7 in the yaw direction and/or by sliding the right analog stick 72B in the left-right direction, it is possible to cause the first virtual camera C1 to operate in conjunction with the second virtual camera C2 with respect to the yaw direction. Moreover, by rotating the terminal device 7 in the pitch direction and/or the roll direction, i.e., by directing the rear surface of the terminal device 7 in a desired direction upward, downward, leftward, and/or rightward, the first user holding the terminal device 7 can view the desired direction in the up, down, left, and/or right directions in the virtual space. Therefore, the first user can have a sweeping view of the virtual space in accordance with the operation performed onto the terminal device 7 held by the first user.

On the other hand, when the terminal device 7 is rotated in the yaw direction, the second virtual camera C2 is also rotated in the yaw direction (about y-axis), but even when the terminal device 7 is rotated in the pitch direction or the roll direction, the second virtual camera C2 is not rotated in the pitch direction or the roll direction. Therefore, even if the first user rotates the terminal device 7 in the pitch direction or the roll direction, the range of the virtual space displayed on the display device 2 is not changed. Thus, the image is easy to see for the second user viewing the display device 2. That is, if an image on the display device 2 is swung upwardly or downwardly or rotated by the first user directing the terminal device 7 upward or downward or rotating it in the roll direction, the image becomes difficult to see for the second user. However, in the present embodiment, since the second virtual camera C2 operates in conjunction with the first virtual camera C1 only in the yaw direction, the image is easy to see for the second user viewing the stationary display device 2.

Next, description will be given of a case where the second user indicates a position on the screen of the display device 2 using the controller 5 while images of the virtual space are being displayed on the terminal device 7 and the display device 2 as described above. FIG. 15 shows a non-limiting example of images displayed on the terminal device 7 and the display device 2 when a position on the screen of the display device 2 is indicated by using the controller 5.

As shown in FIG. 15, when the second user directs the tip of the controller 5 to the display device 2, a pointer 86 which indicates a position on the screen is displayed on the screen of the display device 2. When the pointer 86 is displayed on the display device 2, an indicated object 87 is displayed on the LCD 71 of the terminal device 7. The indicated object 87 is an object having a predetermined three dimensional shape (sphere, for example), and is arranged at a three dimensional position in the virtual space corresponding to the position on the screen of the display device 2 indicated by the pointer 86. Then, a taken image of the virtual space including the indicated object 87 is displayed on the LCD 71 of the terminal device 7. Moreover, an indicator 88 indicating the position of the indicated object 87 is displayed on the terminal device 7. The indicator 88 indicates the positional relationship between the user object 81 and the indicated object 87, and is displayed as an arrow extending from the user object 81 toward the indicated object 87, for example. Since the indicator 88 and the indicated object 87 are displayed on the terminal device 7, the first user viewing the terminal device 7 can know the position of the indicated object 87, that is, the position indicated by the second user.

FIG. 16 illustrates a non-limiting example of a position at which the indicated object 87 is located. First, the indicated position on the screen of the display device 2 indicated by using the controller 5 is calculated. For example, by the imaging section of the controller 5 receiving light from the marker device 6 arranged near (e.g., above the screen) the display device 2, the indicated position (two dimensional) on the screen of the display device 2 is calculated. Next, as shown in FIG. 16, a straight line passing through the indicated position and extending parallel to Zc2-axis for the second virtual camera C2 is calculated. Then, a point at which the straight line intersects a plane which is at a predetermined height h from the ground (xy plane) in the virtual space is calculated as the three dimensional indicated position. Then, the indicated object 87 is located at the three dimensional indicated position calculated in this manner.

FIG. 17 shows a non-limiting example of how the user object 81 is moved based on a direction input using the left analog stick 72A of the terminal device 7. As shown in FIG. 17, by inputting a direction using the left analog stick 72A of the terminal device 7, the first user can move the user object from the position 81′ to the position 81. The first virtual camera C1 and the second virtual camera C2 also move in the virtual space in accordance with the movement of the user object 81. For example, when an up direction (Y-axis positive direction) is inputted by using the left analog stick 72A, the user object 81 is moved forward in the virtual space (i.e., is moved to the depth direction in the screen of the terminal device 7), and the two virtual cameras also move accordingly. When a right direction (X-axis negative direction) is inputted by using the left analog stick 72A, the user object 81 is moved in the right direction in the virtual space, and the two virtual cameras also move accordingly. Further, as shown in FIG. 17, when an upper right direction is inputted by using the left analog stick 72A, the user object 81 is moved to the right forward direction. In this manner, the first user can move the user object 81 in any desired direction in the virtual space, through a direction input using the left analog stick 72A.

In the case where the terminal device 7 is being held vertically, when a direction input is performed by using the left analog stick 72A, the user object 81 is moved in an apparent input direction of the left analog stick 72A, as in the case of the operation using the right analog stick 72B. FIG. 18 illustrates a non-limiting example of a movement of the user object 81 when a direction input operation is performed by using the left analog stick 72A while the terminal device 7 is being held vertically. As shown in FIG. 18, when the left analog stick 72A is slid in the X-axis negative direction while the terminal device 7 is being held vertically, the apparent sliding direction is the up direction in the real space. Therefore, in this case, it is regarded that an up direction has been inputted by using the left analog stick 72A, and the user object 81 is not moved in the right direction but is moved forward (i.e., the depth direction in the screen) in the virtual space. Specifically, as in the case of the operation using the right analog stick 72B described above, an input vector corresponding to the input direction by the left analog stick 72A is rotated in accordance with the rotation about Z-axis for the terminal device 7. Then, the movement direction of the user object 81 is determined in accordance with the rotated vector.

FIG. 19 shows a non-limiting example of a scene where the user object 81 has moved and arrived at the house object 82 indicated by the second user. Here, when the user object 81 has arrived at the house object 82, a game A is selected. The house object 82 is an object for selecting a game to be executed, and a game corresponding to the house object 82 is prepared in advance. Further, in the virtual space, a plurality of selection objects respectively associated with different types of games are arranged in addition to the house object 82 which corresponds to the game A.

FIG. 20 shows a non-limiting example of a scene where the user object 81 has moved and arrived at a building object 89 arranged in the virtual space. As shown in FIG. 20, the building object 89 corresponding to a game B is arranged in the virtual space, and when the user object 81 arrives at the building object 89, the game B is selected.

As described above, by the first user operating the user object 81 to select a selection object associated with each game, the game is executed. By indicating a position on the screen of the display device 2 using the controller 5 while viewing the image displayed on the display device 2, the second user indicates a selection object (game) which he or she wishes the first user to select. By looking at the indicated object 87 displayed on the LCD 71 of the terminal device 7, the first user can know the selection object indicated by the second user. Then, the first user operates the user object 81 to select the selection object, thereby starting the game.

As described above, the indicated object 87 is located at a position in the virtual space corresponding to the indicated position on the screen of the display device 2 and the indicated object 87 is displayed on the terminal device 7, whereby communication between the users can be performed.

It should be noted that the above embodiment is merely an example, and various modifications may be performed as described below for example.

For example, in the above embodiment, the first virtual camera C1 is rotated in the yaw direction in accordance with an input in the apparent left-right direction (left-right direction relative to the gravity direction), which is performed by using the right analog stick 72B. In another embodiment, the first virtual camera C1 may be rotated in the pitch direction, in accordance with an input in the apparent up-down direction (direction parallel to the gravity). That is, in accordance with an input in said up-down direction, the first virtual camera C1 may be directed toward the up-down direction in the virtual space. In this case, an input vector indicating the input direction by the right analog stick 72B is corrected (rotated) in accordance with the attitude of the terminal device 7 to calculate a correction vector, and the first virtual camera C1 is rotated in the yaw direction in accordance with the left-right direction component of the correction vector. Further, the first virtual camera C1 is rotated in the pitch direction in accordance with the up-down direction component of the correction vector.

In the above embodiment, a direction input is performed using an analog stick capable of inputting any direction, and the input direction performed by using the analog stick is corrected in accordance with the attitude of the terminal device 7. In another embodiment, a direction input may performed using a cross key, a plurality of operation buttons arranged in a predetermined pattern, or any other input means, and the input direction may be corrected in accordance with the attitude of the terminal device 7.

In the above embodiment, the second virtual camera C2 operates in conjunction with the first virtual camera C1 only with respect to the yaw direction. However, in another embodiment, the second virtual camera C2 may operate in conjunction with the first virtual camera C1 also with respect to the pitch direction and the roll direction. Moreover, in another embodiment, the second virtual camera C2 may operate in conjunction with the first virtual camera C1 only with respect to a predetermined direction. That is, the first virtual camera C1 may rotate in a plurality of directions (roll, pitch, and yaw) in accordance with an operation onto the terminal device 7, whereas the second virtual camera C2 may rotate in a predetermined direction among the plurality of directions.

In the above embodiment, the first virtual camera C1 and the second virtual camera C2 are arranged in the virtual space, and the first virtual camera C1 operates in conjunction with the second virtual camera C2. An image of the virtual space viewed from the first virtual camera C1 is displayed on the terminal device 7, and an image of the virtual space viewed from the second virtual camera C2 is displayed on the display device 2. In another embodiment, an image viewed from the first virtual camera C1 may be displayed on the terminal device 7 and the display device 2, without setting the second virtual camera C2.

Further, in the above embodiment, the imaging direction of the second virtual camera C2 is made parallel (a predetermined angle difference is allowed) to the imaging direction of the first virtual camera C1, whereby an image (image of the virtual space viewed from behind the user object 81) similar to the image displayed on the terminal device 7 is displayed on the display device 2. That is, in the above embodiment, the direction in the virtual space corresponding to the depth direction for the display device 2 coincides with the direction in the virtual space corresponding to the depth direction for the terminal device 7. However, in another embodiment, the position and the imaging direction of the second virtual camera C2 may not coincide with (substantially coincide with) those of the first virtual camera C1.

FIG. 21 shows non-limiting various examples of the positional relationship between the first virtual camera C1 and the second virtual camera C2 and the imaging directions (sight line directions) thereof. As in the above embodiment, the second virtual camera C2 may be located at a viewpoint B which (substantially) coincides with a viewpoint A of the first virtual camera C1, and an imaging direction B of the second virtual camera C2 may (substantially) coincide with an imaging direction A of the first virtual camera C1. Specifically, the viewpoint B of the second virtual camera C2 may coincide with the viewpoint A of the first virtual camera C1 with respect to the left-right direction and the up-down direction. Alternatively, the viewpoint B of the second virtual camera C2 may coincide with the viewpoint A of the first virtual camera C1 with respect to the left-right direction but may not coincide with that of the first virtual camera C1 with respect to the up-down direction. In this case, as shown in FIG. 3, substantially the same images are displayed on the display device 2 and the terminal device 7, and the direction in the virtual space indicated by the depth direction for the image on the display device 2 corresponds to the depth direction for the image displayed on the terminal device 7. In other words, the imaging direction of the first virtual camera C1 and the imaging direction of the second virtual camera C2 may be set to be substantially parallel (closer to parallel than perpendicular) to each other.

Moreover, as shown in FIG. 21, the second virtual camera C2 may be located at a viewpoint C, and the imaging direction thereof may be set in a direction C. Further, the second virtual camera C2 may be located at a viewpoint D, and the imaging direction thereof may be set in a direction D. That is, the imaging direction of the second virtual camera C2 may be set to be substantially perpendicular (closer to perpendicular than parallel) to the ground in the virtual space.

FIG. 22 shows a non-limiting example of an image displayed on the display device 2 when the second virtual camera C2 is set at the viewpoint C shown in FIG. 21. FIG. 23 shows a non-limiting example of an image displayed on the display device 2 when the second virtual camera C2 is set at the viewpoint D shown in FIG. 22. As shown in FIG. 22, in the display device 2, an image viewed from an upper position in the virtual space than in the terminal device 7 is displayed. Also in this case, since the first virtual camera C1 operates in conjunction with the second virtual camera C2, the image displayed on the display device 2 changes in accordance with an operation performed onto the terminal device 7. Further, as shown in FIG. 23, a bird's-eye view image of the virtual space viewed from directly above may be displayed on the display device 2. Also in this case, the first virtual camera C1 similarly operates in conjunction with the second virtual camera C2. As shown in FIG. 22 and FIG. 23, an image in which the depth direction in the screen extends along the ground in the virtual space is displayed on the terminal device 7 as in the above embodiment, whereas an image in which the depth direction in the screen extends (substantially) perpendicularly to the ground in the virtual space is displayed on the display device 2. That is, an image of the virtual space including the user object 81 viewed from above in virtual space is displayed on the display device 2. In this case, the direction in the virtual space indicated by the up direction of the image displayed on the display device 2 corresponds to the depth direction for the image displayed on the terminal device 7. In other words, the imaging direction of the first virtual camera C1 and the imaging direction of the second virtual camera C2 may be set substantially perpendicularly (closer to perpendicular than parallel) to each other.

In the above embodiment, a position on the screen of the display device 2 is indicated by using the controller 5. However, in another embodiment, a position on the screen of the display device 2 may be indicated by using any device. For example, a pointer on the screen of the display device 2 may be moved by a direction input using: a pointing device such as a mouse; an analog stick; a cross key; a plurality of operation buttons; and the like, and the position of the pointer may be used as an indicated position. Alternatively, a touch panel may be provided on the screen of the display device 2, and a position on the screen of the display device 2 may be indicated by a touch operation.

In the above embodiment, a game corresponding to an object selected by a selection object is executed. In another embodiment, any other program may be executed corresponding to a selected object.

In the above embodiment, a position on the screen of the display device 2 is indicated and the indicated object 87 indicating the indicated position is displayed on the terminal device 7. In another embodiment, a position on the screen of the LCD 71 of the terminal device 7 is indicated, and an indicated object is located at a position in the virtual space corresponding to the indicated position, whereby the indicated object may be displayed on the display device 2.

For example, a touch panel is provided on the screen of the terminal device 7, a position on the LCD 71 is indicated through a touch operation, whereby an indicated object may be located at a position in the virtual space corresponding to the indicated position. Then, an image including the indicated object is displayed on the display device 2, whereby communication may be performed between the first user using the terminal device 7 and the second user viewing the display device 2. Further, a position on the screen of the LCD 71 of the terminal device 7 may be indicated by using an operation device other than the terminal device 7, and an indicated object may be located at a position in the virtual space corresponding to the indicated position. Then, an image including the indicated object may be displayed on the display device 2.

(Flow of Processes)

Next, processes performed in the game system 1 of the present embodiment will be described in detail. First, various types of data stored in the memory will be described. FIG. 24 shows a non-limiting example of various types of data stored in the game apparatus 3.

As shown in FIG. 24, a program 100 for performing later-described processes, a game program 101 for executing the game A, and a game program 102 for executing the game B are stored in the memory 11 and the like in the game apparatus 3. Attitude data 110 indicating the attitude of the terminal device 7, input direction data 111 indicating input directions of the left analog stick 72A and the right analog stick 72B, first virtual camera data 112 indicating the orientation of the first virtual camera C1, second virtual camera data 113 indicating the orientation of the second virtual camera C2, indicated position data 114 indicating the position on the screen of the display device 2 indicated by using the controller 5, object data 115 indicating the position of a user object, and the like are stored in the game apparatus 3. Moreover, data and the like indicating the positions of the house object 82 and the building object 89 are stored in the game apparatus 3.

(Description of Flowchart)

Next, processes performed in the game apparatus 3 (CPU 10) will be described in detail with reference to FIG. 25. FIG. 25 is a non-limiting example of a main flowchart showing the flow of the processes performed in the game apparatus 3.

First, the game apparatus 3 obtains (calculates) the attitude of the terminal device 7 based on data which is from the inertial sensor 73 of the terminal device 7 and stored in the memory (step S101). Next, based on operation data which is from the terminal device 7 and stored in the memory, the game apparatus 3 obtains input vectors indicating input directions inputted by using the right analog stick 72B and the left analog stick 72A, respectively (step S102).

Next, the game apparatus 3 controls the first virtual camera C1 and the second virtual camera C2 based on the attitude of the terminal device 7 and the input vector of the right analog stick 72B (step S103). Specifically, the game apparatus 3 calculates an orientation of the first virtual camera C1 in accordance with the rotation of the terminal device 7 in the yaw direction, the pitch direction, and the roll direction. Moreover, the game apparatus 3 calculates a correction vector based on the input vector indicating the input direction by the right analog stick 72B and the rotation of the terminal device 7 in the roll direction, and rotates the first virtual camera C1 about y-axis in accordance with the calculated correction vector. Moreover, the game apparatus 3 sets an orientation of the second virtual camera C2 in accordance with the orientation of the first virtual camera C1 as described above.

Next, the game apparatus 3 obtains an indicated position on the screen of the display device 2 using the controller 5 (step S104), and calculates a three dimensional position, which is a position in the virtual space corresponding to the indicated position (step S105). Then, the game apparatus 3 locates the indicated object 87 at the calculated three dimensional position (step S106). Through the above processes, images viewed from the first virtual camera C1 and the second virtual camera C2 are generated respectively, and outputted to the terminal device 7 and the display device 2, respectively. Accordingly, an image of the virtual space including the indicated object 87 viewed from the first virtual camera C1 is displayed on the terminal device 7, and an image of the virtual space viewed from the second virtual camera C2 which operates in conjunction with the first virtual camera C1 is displayed on the display device 2.

Next, the game apparatus 3 moves the user object 81 in the virtual space, based on the input vector in accordance with the input direction by the left analog stick 72A (step S107). In this case, as described above, the input vector is corrected in accordance with the attitude of the terminal device 7 and then the user object 81 is moved based on the corrected vector. Then, it is determined whether the moved user object 81 has arrived at the position of the selection object arranged in the virtual space (step S108). When the user object 81 has arrived at the selection object (step S108: YES), the game apparatus 3 starts execution of a game program stored in the memory that corresponds to the selection object (step S109). When the user object 81 has not arrived at the selection object (step S108: NO), the game apparatus 3 ends the processes shown in FIG. 25.

It should be noted that the processes in the flowchart shown in FIG. 25 are repeatedly performed. The process of each step in the flowchart is merely an example and the order of processes of the steps may be changed as long as a similar result can be obtained.

Further, a part of the processes described above may be performed in the terminal device 7. For example, in accordance with the attitude of the terminal device 7 and a direction input using an analog stick, the orientation of the first virtual camera C1 may be calculated in the terminal device 7. In this case, the terminal device 7 calculates a vector obtained by rotating an input vector of the analog stick in accordance with the attitude of the terminal device 7, and calculates the orientation of the first virtual camera C1 based on the calculated vector.

Further, the above programs may not be executed in the game apparatus 3, but may be executed in any other information processing apparatus, and the information processing apparatus may function as the game system described above. For example, as another information processing apparatus, a mobile phone, a smart phone, a PDA, a personal computer, a tablet-type computer, or the like may be used. Such information processing apparatuses may function as the game apparatus 3 and the terminal device 7.

Further in another embodiment, in a game system including a plurality of apparatuses capable of communicating with each other, the plurality of apparatuses may share the execution of the above-described game processing performed in the game apparatus 3. For example, a plurality of information processing apparatuses connected to a network such as the Internet may form the game system as described above.

Further, in the above embodiment, the processes in the above flowchart are performed, by the CPU of the game apparatus 3 executing programs. In another embodiment, a part or the whole of the above processes may be performed by a dedicated circuit included in the game apparatus 3 or by a different general-purpose processor. At least one processor may function as a “programmed logic circuit” for performing the above-described processes.

The systems, devices and apparatuses described herein may include one or more processors, which may be located in one place or distributed in a variety of places communicating via one or more networks. Such processor(s) can, for example, use conventional 3D graphics transformations, virtual camera and other techniques to provide appropriate images for display. By way of example and without limitation, the processors can be any of: a processor that is part of or is a separate component co-located with the stationary display and which communicates remotely (e.g., wirelessly) with the movable display; or a processor that is part of or is a separate component co-located with the movable display and communicates remotely (e.g., wirelessly) with the stationary display or associated equipment; or a distributed processing arrangement some of which is contained within the movable display housing and some of which is co-located with the stationary display, the distributed portions communicating together via a connection such as a wireless or wired network; or a processor(s) located remotely (e.g., in the cloud) from both the stationary and movable displays and communicating with each of them via one or more network connections; or any combination or variation of the above.

The processors can be implemented using one or more general-purpose processors, one or more specialized graphics processors, or combinations of these. These may be supplemented by specifically-designed ASICs (application specific integrated circuits) and/or logic circuitry. In the case of a distributed processor architecture or arrangement, appropriate data exchange and transmission protocols are used to provide low latency and maintain interactivity, as will be understood by those skilled in the art.

Similarly, program instructions, data and other information for implementing the systems and methods described herein may be stored in one or more on-board and/or removable memory devices. Multiple memory devices may be part of the same device or different devices, which are co-located or remotely located with respect to each other.

While certain example systems, methods, devices and apparatuses have been described herein, it is to be understood that the appended claims are not to be limited to the systems, methods, devices and apparatuses disclosed, but on the contrary, are intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. 

What is claimed is:
 1. A display control system configured to control, in accordance with an operation performed onto an operation device which includes a direction input section and a display section, a display content for the display section, the display control system comprising: an input data obtaining section configured to obtain input data in accordance with an input direction inputted by using the direction input section; a first virtual camera control section configured to control a virtual camera in a virtual space based on the input direction; and a display control section configured to cause the display section to display an image based on the virtual camera controlled by the first virtual camera control section, wherein the first virtual camera control section changes the input direction indicated by the input data, in accordance with a change in an attitude of the operation device, and controls the virtual camera based on the changed direction.
 2. The display control system according to claim 1, wherein the first virtual camera control section controls the virtual camera based on an input direction inputted by using the direction input section, the input direction being based on a real space.
 3. The display control system according to claim 1, further comprising: a second virtual camera control section configured to control an orientation of the virtual camera, in accordance with the attitude of the operation device.
 4. The display control system according to claim 1, wherein the first virtual camera control section changes an orientation of the virtual camera such that the changed direction of the orientation of the virtual camera agrees with a direction in the virtual space corresponding to an input direction inputted by using the direction input section, the input direction being based on a real space.
 5. The display control system according to claim 1, wherein the first virtual camera control section rotates the input direction in accordance with a rotation of the operation device about an axis perpendicular to a screen of the display section, and controls an orientation of the virtual camera based on the rotated input direction.
 6. The display control system according to claim 1, wherein based on a component in a predetermined direction of the input direction, the first virtual camera control section changes an orientation of the virtual camera into a predetermined direction in the virtual space.
 7. The display control system according to claim 3, wherein in accordance with a rotation of the operation device about an axis perpendicular to a screen of the display section, the second virtual camera control section rotates the virtual camera about an imaging axis thereof in the rotation direction of the operation device.
 8. The display control system according to claim 1, further comprising: a user object control section configured to control a moving direction of a user object movable in the virtual space, based on an input direction inputted by using the direction input section or a second direction input section provided in the operation device, wherein the user object control section changes the input direction in accordance with the change in the attitude of the operation device, and controls the moving direction of the user object based on the changed direction, and the display control section causes the display section to display an image including the user object.
 9. The display control system according to claim 1, further comprising: a third virtual camera control section configured to change an orientation of a second virtual camera arranged in the virtual space, in accordance with an orientation of the virtual camera; and a second display control section configured to cause a display device other than the display section to display an image of the virtual space viewed from the second virtual camera.
 10. A display control method for controlling, in accordance with an operation performed onto an operation device which includes a direction input section and a display section, a display content for the display section, the display control method comprising: an input data obtaining step of obtaining input data in accordance with an input direction inputted by using the direction input section; a first virtual camera control step of controlling a virtual camera in a virtual space based on the input direction; and a display control step of causing the display section to display an image based on the virtual camera controlled in the first virtual camera control step, wherein in the first virtual camera control step, the input direction indicated by the input data is changed in accordance with a change in an attitude of the operation device, and the virtual camera is controlled based on the changed direction.
 11. The display control method according to claim 10, wherein in the first virtual camera control step, the virtual camera is controlled based on an input direction inputted by using the direction input section, the input direction being based on a real space.
 12. The display control method according to claim 10, further comprising: a second virtual camera control step of controlling an orientation of the virtual camera, based on the attitude of the operation device.
 13. The display control method according to claim 10, wherein in the first virtual camera control step, an orientation of the virtual camera is changed such that the changed direction of the orientation of the virtual camera agrees with a direction in the virtual space corresponding to an input direction inputted by using the direction input section, the input direction being based on a real space.
 14. The display control method according to claim 10, wherein in the first virtual camera control step, the input direction is rotated in accordance with a rotation of the operation device about an axis perpendicular to a screen of the display section, and an orientation of the virtual camera is controlled in accordance with the rotated input direction.
 15. The display control method according to claim 10, wherein in the first virtual camera control step, an orientation of the virtual camera is changed, based on a component in a predetermined direction of the input direction, into a predetermined direction in the virtual space.
 16. The display control method according to claim 12, wherein in the second virtual camera control step, in accordance with a rotation of the operation device about an axis perpendicular to a screen of the display section, the virtual camera is rotated about an imaging axis thereof in the rotation direction of the operation device.
 17. The display control method according to claim 10, further comprising: a user object control step of controlling a moving direction of a user object movable in the virtual space, based on an input direction inputted by using the direction input section or a second direction input section provided in the operation device, wherein in the user object control step, the input direction is changed in accordance with the change in the attitude of the operation device, and the moving direction of the user object is controlled based on the changed direction, and in the display control step, the display section is caused to display an image including the user object.
 18. The display control method according to claim 10, further comprising: a third virtual camera control step of changing an orientation of a second virtual camera arranged in the virtual space, in accordance with an orientation of the virtual camera; and a second display control step of causing a display device other than the display section to display an image of the virtual space viewed from the second virtual camera.
 19. A computer-readable storage medium having stored thereon a display control program for controlling, in accordance with an operation performed onto an operation device which includes a direction input section and a display section, a display content for the display section, the program causing the computer to execute: obtaining input data in accordance with an input direction inputted by using the direction input section; controlling a virtual camera in a virtual space based on the input direction; and causing the display section to display an image based on the controlled virtual camera, wherein the input direction indicated by the input data is changed in accordance with a change in an attitude of the operation device, and the virtual camera is controlled based on the changed direction.
 20. A display control apparatus configured to control, in accordance with an operation performed onto an operation device which includes a direction input section and a display section, a display content for the display section, the display control apparatus comprising: an input data obtaining section configured to obtain input data in accordance with an input direction inputted by using the direction input section; a virtual camera control section configured to control a virtual camera in a virtual space based on the input direction; and a display control section configured to cause the display section to display an image based on the virtual camera controlled by the virtual camera control section, wherein the virtual camera control section changes the input direction indicated by the input data in accordance with a change in an attitude of the operation device, and controls the virtual camera based on the changed direction.
 21. A display control system configured to control, in accordance with an operation performed onto an operation device which includes a direction input section and a display section, a display content for the display section, the display control system comprising: an input data obtaining section configured to obtain input data in accordance with an input direction inputted by using the direction input section; a control section configured to control a predetermined object in a virtual space based on the input direction; and a display control section configured to cause the display section to display an image in accordance with an attitude of the operation device and to cause the display section to display an image based on a predetermined object controlled by the control section, wherein the control section changes the input direction indicated by the input data in accordance with a change in the attitude of the operation device, and controls the predetermined object based on the changed direction. 